IEEE C37.101 1994

$30.88

IEEE Guide for Generator Ground Protection

Published By	Publication Date	Number of Pages
IEEE	1994	59

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Description

Revision Standard – Inactive – Superseded. Superseded by IEEE Std C37.101-2006 This IEEE Standards product is part of the C37 family on Switchgear, Substations and Protective Relays. Guidance in the application of relays and relaying schemes for protection against stator ground faults on high-impedance grounded generators is provided.

PDF Catalog

PDF Pages	PDF Title
1	Title Page
3	Introduction
4	Participants
6	CONTENTS
8	1. Overview 1.1 Scope 1.2 Description of the guide
9	2. References 3. Summary of protection schemes
11	4. Generator connections
13	5. Grounding methods 5.1 Method I: High-resistance grounded (distribution-transformer grounded)
14	5.2 Method II: High-resistance grounded (neutral-resistor grounded) 5.3 Method III: Low-resistance grounded (neutral-resistor grounded) 5.4 Method IV: Low-inductance grounded (neutral-reactor grounded) 5.5 Method V: Resonant grounded (ground-fault neutralizer grounded {GFN])
15	5.6 Method VI: High-resistance grounded (grounding-transformer grounded) 5.7 Method VII: Medium-resistance grounded (grounding-transformer grounded) 5.8 Method VIII: Ungrounded 6. Protective schemes
16	6.1 Scheme 1: Ground overvoltage—Complete shutdown
18	6.2 Scheme 2: Ground overvoltage—Permissive shutdown
19	6.3 Scheme 3: Ground overvoltage—Alarm and time-delay shutdown 6.4 Scheme 4: Ground overvoltage—Alarm
20	6.5 Scheme 5: Start-up ground overvoltage—Complete shutdown
21	6.6 Scheme 6: Ground-fault neutralizer overvoltage—Alarm and time-delay orderly shutdown
23	6.7 Scheme 7: Wye-broken-delta voltage transformer (vt) ground overvoltage—Complete shutdown
24	6.8 Scheme 8S: Start-up wye-broken-delta vt, ground overvoltage—Complete shutdown 6.9 Scheme 9: Secondary-connected current transformer (ct), time-delay ground overcurrent—Complete shutdown
25	6.10 Scheme 10: Primary connected ct, time-delay ground overcurrent—Complete shutdown
26	6.11 Scheme 11: Instantaneous ground overcurrent—Alarm and/or complete shutdown
27	6.12 Scheme 12: Generator leads ground overcurrent—Complete shutdown
28	6.13 Scheme 13: Three-wire generator leads window ct instantaneous ground overcurrent—Complete shutdown
29	6.14 Scheme 14: Four-wire generator leads window current transformer instantaneous ground overcurrent—Complete shutdown 6.15 Scheme 15: Generator percentage differential—Complete shutdown
30	6.16 Scheme 16: Generator ground differential using product type relay
31	6.17 Scheme 17: Delta-connected generator, generator percentage differential—Complete shutdown 6.18 Scheme 18: Ground-fault relays for the complete protection of the generator stator winding
36	6.19 Scheme 19: Alternate stator winding protection using high-impedance differential relays
37	6.20 Scheme 20: Generator neutral overcurrent protection for the case of accidental solid neutral grounding
40	7. Protective device function numbers
42	Annex A—Ground protection example for a high-resistance grounded generator
54	Annex B—Ground protection example to determine the percent coverage of a high-impedance differential relay
57	Annex C—Bibliography